[A51] airprobe-freq hopping

tom tomei9dl at gmail.com
Fri Nov 14 21:24:51 CET 2014


Hi all
Trying to get frequency hopping on gnuradio 3.7 and 
https://github.com/BogdanDIA/airprobe-hopping
The build goes fine but when I try to run ./capture_decode I get the 
following.

./capture_decode_channelize2.sh
min_ARFCN: 18
max_ARFCN: 25
Center ARFCN: 21
Center frequency: 939200000khz
Sampling rate: 464286
Number of samples: 256000000
CA files:  out/out_18.cf out/out_21.cf out/out_22.cf out/out_23.cf 
out/out_24.cf out/out_25.cf
C0 ARFCN: 18
C0 position: 0
SR: 464286
NCHANNELS: 50
pfbDECIM: 17
totDECIM: 112
linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.008.000-18-g864f84b5

-- Opening a USRP1 device...
-- Using FPGA clock rate of 52.000000MHz...
-- Tune Request: 939.200000 MHz
--   The RF LO does not support the requested frequency:
--     Requested LO Frequency: 939.200000 MHz
--     RF LO Result: 939.250000 MHz
--   Attempted to use the DSP to reach the requested frequency:
--     Desired DSP Frequency: 0.050000 MHz
--     DSP Result: 0.050000 MHz
--   Successfully tuned to 939.200000 MHz
-- 
out/out.cf: No such file or directory
Traceback (most recent call last):
   File "/usr/local/bin/uhd_rx_cfile", line 215, in <module>
     tb = rx_cfile_block(options, filename)
   File "/usr/local/bin/uhd_rx_cfile", line 104, in __init__
     self._sink = blocks.file_sink(gr.sizeof_gr_complex, filename)
   File 
"/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py", line 
920, in make
     return _blocks_swig0.file_sink_make(*args, **kwargs)
RuntimeError: can't open file
Number of taps:      211
Number of channels:  50
Taps per channel:    5.0
pfb oversampling:  2.94117647059
Using Volk machine: sse4_a_64_orc
./out/out.cf: No such file or directory
Traceback (most recent call last):
   File "./channelize2.py", line 101, in <module>
     main()
   File "./channelize2.py", line 93, in main
     tb = pfb_top_block()
   File "./channelize2.py", line 67, in __init__
     self.input = blocks.file_source(gr.sizeof_gr_complex, 
"./out/out.cf", False);
   File 
"/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py", line 
984, in make
     return _blocks_swig0.file_source_make(*args, **kwargs)
RuntimeError: can't open file
sps:  0.428571428571
c0pos 0
out/out_18.cf: No such file or directory
Traceback (most recent call last):
   File "./gsm_receive100_channelize.py", line 147, in <module>
     main()
   File "./gsm_receive100_channelize.py", line 142, in main
     gsm_receiver_first_blood().run()
   File "./gsm_receive100_channelize.py", line 50, in __init__
     self.sources.append(self._set_source(ifile))
   File "./gsm_receive100_channelize.py", line 72, in _set_source
     zrodlo = blocks.file_source(gr.sizeof_gr_complex, nazwa_pliku, False)
   File 
"/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig0.py", line 
984, in make
     return _blocks_swig0.file_source_make(*args, **kwargs)
RuntimeError: can't open file

I am trying this with USRP1 and my clock frequency is changed to 52mhz.
Can someone please tell me what need to change.
Tom



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